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Od Off Light Blinking, Hard 1St Shift


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#1
dandy

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Howdy all! I have a 95 mazda atx 4cyl. I am getting some prtty good "bucking" or real hard shifting from 1-2. The OD OFF light is also blinking on the dash. I drained a bit of atx fluid because it was a bit over the line, and added some "stop slip" stuff, which did nothing of course lol. It generally shifts fine in the rest of the gears but will occasionally have a hard, but not nearly as hard, 2-3 shift. ANy ideas?

#2
djdevon3

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OD blinking and having shift problems for us automatic owners is usually really bad. Only thing you can hope to do is check the ATX fluid, change the transaxle range and throttle position sensors. If that doesn't work it means your transmission is near death. Depending on how you drive maybe a few days to a week left. Next stop is probably a mechanic, transmission specialist, or junkyard. Your call.

#3
dandy

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Hmm...I see I put this in the wrong forum I think...probably suposd to go in technical section. Could you or another mod move it for me please?

The fluid was pretty dark. It has been doing this for about 2 months actually...hasnt got much worse. I know all that hard shifting cant be good for her though.

#4
djdevon3

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Dark fluid means the transmission fluid is burning. Heat buildup is the killer of the CD4E transmission (what you have). If a fluid change is going to do anything positive for you it will show immediate results on the first drive after the change. Do NOT allow the transmission to be pressure flushed as that can do damage to failing transmissions by stirring up metallic sediments. What you'll want to do is gradual fluid changes and keep an eye on the fluid color and level between each change like an eagle.

It is possible to get the car running better with automatic transmission fluid changes if the fluid is dark or even brown/black. However, if it gets to the point that the fluid is brown or black the transmission is likely already burnt up and you're just saving a bit of time before complete failure. If you catch it in time before it gets really dark and is burning up a fluid change will help to dissipate heat and might possibly prolong the life of your transmission to the point of being useful again.

ATF fluid for us automatic owners is the Spice Melange. The spice extends life. The spice expands consciousness. It's the most precious substance in the universe to the 626 automatic. Oh and you might want to read this and this.

#5
dandy

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I just wanted to say that I was able to "temporarily" fix this problem by resetting the computer (disconnecting the battery for a little while and stepping on the brakes)

I do not know what was causing the problem but I would assume it was some kind of faulty sensor. I did end up selling the car for a loss. This car is such a piece of junk I can't believe it even has such a fantastic website devoted to it. Why anyone cares anything at all about this junk is beyond me, but I am grateful he resource is/was here.

I will again ask that this thread is moved to the technical section where hopefully someone experiencing the problem can find some helpful information. Good day to all of you fine people, but I would never ever EVER even think about buying another one of these cars.

#6
djdevon3

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Sorry to hear you feel that way. There are plenty of people that share your sentiments about the automatic version of the car. I'm not going to defend Mazda for that because I think you are correct. However, passion is passion and to each his own. Some of us here have found a passion. I hope you find yours in another car whatever that may be.

#7
tjvjr

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^^Very well said , I too hope all is well moving forward.

#8
MazRedMan

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A flashing OD light means the transmission has 'over-heated' and has gone into 'safe mode'.....supposedly to save transmission from further damage. Letting the car sit (turned off) for a couple of hours to 'cool off' transmission usually resets back to 'normal' position ...and flashing OD light turns off. However, if continued 'over-heating' occurs then you will eventually need a new or rebuilt transmission.

Changing the trans fluid is a good start but adding an external trans cooler to your system is best. But if your transmission is already 'dying' (due to not dealing with the problem sooner) then a new or rebuilt or converting to manual trans or selling is in your future.

Any and all 'older' cars need regular maintenance in order to last. Not dealing with problems right away can be 'costly' and inconvenient later on. Certainly, the 626 with the CD4E auto transmission isn't great but with some 'loving care', it can be a fun and reliable car to drive.....my 98 auto trans has 163,000 miles....rebuilt @ 93,000 then added external cooler.....runs great! Knock On Wood! ;)

#9
Erich

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On 2002 626 ES (2.5 V6) O/D Light flashing, CEL light is on and Speedometer is off. After a bit of rest, O/D light is off; comes on within 1 minute of driving (as explained in the above post by MazRedMan.

Checked transmission fluid; it's OK and no burned smell.

How to proceed to determine what's wrong from here?

#10
Tiberianx

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Pulling out the CEL codes and post them in this forum would be a good start. :thumbsup:

#11
4thgenceli

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Don't tell the OP this...

but my 2002 4cyl with the ATX has 208k miles on the <ORIGINAL> motor and transmission. Yes it's the FSDE motor and CD4E transmission. It had an external transmission oil cooler installed along with the cooler built into the radiator. When it's cold out the 1-2 shift is hard. Everything else is butter smooth. When it warms up it smoothed out. Also if I accelerate hard it shifts smooth from 1st to 2nd.

It's also a known fact that the shift points in this transmission (and other Mazda's) is set harshly. The 2005 Mazda3 I drive every now and again also has a hard shift from 1st to 2nd.

So you can't take it out on the car. The previous owner most likely abused the piss out of the car and didn't give 2 shakes to the condition when he sold it.

#12
Paul Walls Sr.

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My 1997 626 is throwing codes P0743, P0750, P0755 and P1788. The OD light blinks from the time the engine is started. Any Ideas ????



#13
djdevon3

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http://www.obd-codes.../trouble_codes/

P0743 - Torque Converter Clutch Circuit Electrical

P0750 - Shift Solenoid A Malfunction

P0755 - Shift Solenoid B Malfunction

P1788 - 3-2T/CCS Circuit Shorted

 

Paul
you have some serious transmission error codes there.  Take it to a
professional transmission shop for service.  It's possible your
transmission will fail to shift at any time including while coasting on
the highway and not even in the middle of a shift.






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